WO2011017983A1

WO2011017983A1 - Usb interface device and terminal device

Info

Publication number: WO2011017983A1
Application number: PCT/CN2010/074296
Authority: WO
Inventors: 张霞玲; 李春澍
Original assignee: 华为终端有限公司
Priority date: 2009-08-12
Filing date: 2010-06-23
Publication date: 2011-02-17
Also published as: EP2432080A1; US20120100755A1; CN201528090U; US8342882B2; EP2432080B1; EP2432080A4

Abstract

A USB (Universal Serial Bus) interface device and a terminal device. The USB interface device (6) includes a USB connector connected electrically with a circuit board (5) by pins (4) and a shielding frame (7) attached to the joint of the USB connector and the circuit board and covering the pins. The shielding frame is a frame having a first opening at the part thereof attached to the circuit board and a second opening at the part thereof attached to the USB connector. The USB interface device can avoid the electro-magnetic interference caused by data transmission. The USB interface device can be used to all kinds of devices with USB interfaces such as wireless telecommunication equipments.

Description

USB interface device and terminal device The present application claims to be filed on August 12, 2009, the Chinese Patent Office, the application number is CN 200920171219. 2. The priority of the Chinese patent application entitled "USB interface device and terminal device", all of which are The content is incorporated herein by reference. TECHNICAL FIELD The present invention relates to the field of electromagnetic interference technology, and more particularly to a USB interface device and a terminal device having electromagnetic interference protection functions. Background technique

USB (Universal Serial Bus) interface standard is gradually developed, and the transmission rate is continuously improved. According to the USB2.0 standard, the transmission rate has reached 480MB/s (megabits per second), and the transmission of the future USB3.0 standard is achieved. The rate will be higher. At present, the USB interface has been widely used as an interface for data transmission, and many data cards are also connected to a computer through a USB interface. As shown in FIG. 1, the pin 2 of the existing USB connector 1 is directly soldered on the pad of the PCB (printed circuit board) 3, and the four pins 2 of the USB connector 1 (including two power pins) Both the data pins and the two data pins are exposed to the outside of the PCB (printed circuit board) 3; since the USB connector 1 needs to transmit data at a high rate, such high-rate data transmission generates electromagnetic radiation.

The inventors have found that at least the following problems exist in the prior art: In the case where a data card (ie, a wireless modem) is also connected to a computer through a USB interface, electromagnetic radiation generated by the USB interface generates electromagnetic interference (EMI, Electro Magnetic Interference) on the data card. The wireless performance of the data card is degraded, which directly affects the wireless performance of the whole machine; and the greater the data transmission rate of the USB interface, the more serious the electromagnetic interference is generated, so the higher transmission rate of the future USB 3.0 standard will cause more serious Electromagnetic interference. Summary of the invention

Embodiments of the present invention provide a USB interface device and a terminal device that shield electromagnetic interference generated by a USB connector due to data transmission.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

A USB interface device includes a USB connector electrically connected to a circuit board through a pin, the USB interface device further comprising a shielding frame attached to the USB connector and the circuit board connection and covering the pin; The shielding frame is a frame having a first open opening at a portion that is bonded to the circuit board and a second open opening at a portion that is bonded to the USB connector.

A terminal device, comprising the USB interface device according to any one of claims 1 to 6, and an access module;

The access module is configured to implement wireless access to the network by the terminal device.

The USB interface device and the terminal device provided by the embodiment of the present invention have electromagnetic shielding generated by the pin at the USB connector when the USB interface transmits the data at a high rate due to the shielding frame covering the pin at the connection between the USB connector and the PCB. Radiation, the electromagnetic radiation can also be shielded by the shielding frame, so that the electromagnetic radiation generated by the pins at the USB connector does not cause electromagnetic interference to the wireless communication. If the solution is applied to a device that requires wireless communication, such as a data card of a USB interface, electromagnetic interference can be shielded and the performance of the whole machine can be improved. Even if the transmission speed of the USB interface is higher, it will not cause electromagnetic interference to the wireless communication, which is also ready for the USB interface transmission rate to be further improved. BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

1 is a structural diagram of a connection between a USB connector and a PCB in the prior art;

2 is a structural diagram of a shielding frame according to an embodiment of the present invention;

3 is a structural view of a shielding frame and a shielding cover according to an embodiment of the present invention;

4 is another structural diagram of a shielding cover according to an embodiment of the present invention;

FIG. 5 is an effect diagram of the assembly completion of the embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The present invention is embodied in, for example, FIG. 2, the USB interface device includes a USB connector 6 electrically connected to the PCB 5 via a pin 4, the pins 4 including two power pins and two data pins, and may be soldered Mode connection To the PCB 5, the USB interface device further includes a shield frame 7 that is attached to the USB connector 6 and the PCB 5 connection and covers the pin 4. When the USB interface transmits data at a high rate, the pin 4 at the USB connector 6 generates electromagnetic radiation, and the electromagnetic radiation is shielded by the shielding frame 7, so that the electromagnetic radiation generated by the pin 4 at the USB connector 6 is not Will cause electromagnetic interference to wireless communications. Even if the transmission rate of the USB interface is higher and higher, it will not cause electromagnetic interference to the wireless communication, which is also ready for further improvement of the transmission rate of the USB interface. Among them, the USB interface here can be a USB A type male port.

As shown in FIG. 2, in general, the shielding frame 7 may be a hexahedral frame 8 having two faces that need to be attached to the PCB 5 and the USB connector 6, respectively, and All or part of the surface of the frame 8 to which the PCB 5 is attached is provided as an open opening, and all or part of the surface to which the USB connector 6 is attached is provided as an open opening. The open opening of the frame 8 disposed at a portion that is in contact with the PCB 5 is referred to as a first open opening, and the open opening of the frame at a portion that is attached to the USB connector 6 is referred to as a second open opening. . Of course, the shielding frame 7 may not be a hexahedron-shaped frame 8. For example, in FIG. 2, the portion of the shielding frame 7 that is not in contact with the PCB 5 or the portion that is not attached to the USB connector 6 is set as a curved surface. .

In order to check whether the pin 4 of the USB interface is soldered firmly after the assembly is completed, as shown in FIG. 2, an observation window 9 for observing the pin 4 may be provided on the frame 8 for observing the pin. .

In order to make the effect of shielding electromagnetic interference better, as shown in FIG. 3, the embodiment of the present invention can also cover a shielding cover 10 on the outer side of the shielding frame 11, and the shape structure of the shielding frame 11 can be described in FIG. The structure of the shield frame 7 is identical.

The shield cover 10 of Fig. 3 needs to be fixed together with the shield frame 11 to prevent misalignment. The embodiment of the present invention can fix the shield cover 10 and the shield frame 11 by using, but not limited to, the following:

First, as shown in FIG. 3, at least one limiting hole 12 is disposed on the shielding frame 11, and a limiting protrusion 13 corresponding to the limiting hole is disposed on the shielding cover 10, After the limiting protrusion 13 is inserted into the limiting hole 12, the shielding frame 11 and the shielding cover 10 can be positioned to ensure that there is no misalignment between the two.

Secondly, at least one limiting protrusion is disposed on the shielding frame 11 , which is not shown in the structural diagram, and a limiting hole corresponding to the limiting protrusion is disposed on the shielding cover 10 , After the limiting protrusion is inserted into the limiting hole, the shielding frame and the shielding cover can be positioned to ensure that there is no misalignment between the two.

Regardless of whether the limiting protrusion is disposed on the shielding frame or the shielding cover, the limiting protrusion can be formed by stamping. This pressing process can quickly punch out the limiting protrusion, improve production efficiency and reduce production. cost. Of course, fixing the shielding cover 10 to the shielding frame 11 may also be a bolt, a screw connection, a pasting connection or the like. Under normal circumstances, the USB device adopts the shielding mode corresponding to Figure 2 or Figure 3, which is enough to complete the basic functions. In some cases, there may be multiple PCBs (circuit boards) on the USB device, which requires further shielding scheme. Improve. For example, as shown in FIG. 4, the USB interface device further includes another PCB board, that is, the second PCB 14, in order to be able to fix the second PCB 14, the embodiment of the present invention is provided with a fixing hole 15 on the second PCB 14. And a fixing pin 16 corresponding to the fixing hole 15 is provided on the shielding cover, and the fixing pin 16 is inserted into the fixing hole 15 to fix the second PCB 14. The structure of the other parts of the shielding cover and the structure of the shielding frame can adopt the scheme of FIG. 3, and the effects of assembling all the PCBs, the shielding frame, the shielding cover and the USB connector are as shown in FIG. 5.

The embodiment of the present invention further provides a terminal device, where the terminal device adopts the technical solution of the USB interface device in FIG. 2 to FIG. 5, and the terminal device further includes an access module (not shown). The ingress module is configured to implement the wireless access network of the terminal device. For example, the access module may be a WIFI access module, a 3G access module, or the like.

The terminal device may be a data card. In this case, the data card is connected to the USB interface of the computer through the USB interface device, and the data card is used to implement wireless access to the network by the computer through the data card.

The embodiments of the present invention are mainly used in various devices using a USB interface, especially in a wireless communication device using a USB interface. For example, the USB interface device provided by using the new embodiment may be used in various terminal devices, and the terminal device may be various fixed terminals or mobile terminals having a USB interface, for example, a data card with a USB interface, and 3G data. Cards, mobile phones, etc.; in addition, the antenna device can also be used in various mobile devices or portable devices with USB interfaces, for example, MP3 players with USB interface, MP4 players, PSP (PlayStation Portable, portable game stations) , digital cameras, USB flash drives, etc. Among them, the 3G data card refers to a device that is applied to a computer and uses the third generation mobile communication technology to access the Internet.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any change or replacement that can be easily conceived by those skilled in the art within the technical scope of the present invention is All should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Rights request

What is claimed is: 1. A USB interface device comprising: a USB connector electrically connected to a circuit board through a pin, wherein the USB interface device further comprises attaching to the USB connector and the circuit board connection and covering the a shield frame of the pin;

The shielding frame is a frame having a first open opening at a portion that is bonded to the circuit board and a second open opening at a portion that is bonded to the USB connector.

2. The USB interface device according to claim 1, wherein the frame is further provided with an observation window for observing the pin.

The USB interface device according to claim 1 or 2, wherein the USB interface device further comprises a shielding cover that is wrapped on the outside of the shielding frame.

4. The USB interface device according to claim 3, wherein

At least one limiting hole is disposed on the shielding frame, and a limiting protrusion corresponding to the limiting hole is disposed on the shielding cover; or, at least one limit is disposed on the shielding frame And a limiting hole corresponding to the limiting protrusion is disposed on the shielding cover.

The USB interface device according to claim 4, wherein the limiting protrusion is a limiting protrusion formed by stamping.

The USB interface device according to claim 3, wherein the shielding cover is provided with a fixing pin, and the fixing pin corresponds to a fixing hole on a circuit board provided with another fixing hole. The fixing pin is inserted into the fixing hole to fix the another circuit board provided with a fixing hole.

The USB interface device according to claim 1 or 2, wherein the pin is connected to the circuit board through the first open opening, and the pin passes through the second open The port is connected to the USB connector.

A terminal device, comprising: the USB interface device according to any one of claims 1 to 7, and an access module;

The terminal device according to claim 8, wherein the terminal device is a data card, and the data card is connected to a USB interface of the computer through the USB interface device, and is configured to implement the computer by using the Data card wireless access network.